WO2003049278A3 - Signal processing element - Google Patents

Signal processing element Download PDF

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Publication number
WO2003049278A3
WO2003049278A3 PCT/GB2002/005509 GB0205509W WO03049278A3 WO 2003049278 A3 WO2003049278 A3 WO 2003049278A3 GB 0205509 W GB0205509 W GB 0205509W WO 03049278 A3 WO03049278 A3 WO 03049278A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
main
main amplifier
amplifier
processing element
Prior art date
Application number
PCT/GB2002/005509
Other languages
French (fr)
Other versions
WO2003049278A2 (en
Inventor
Paul Alun Warr
Original Assignee
Univ Bristol
Paul Alun Warr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Bristol, Paul Alun Warr filed Critical Univ Bristol
Priority to EP02804314A priority Critical patent/EP1508197A2/en
Publication of WO2003049278A2 publication Critical patent/WO2003049278A2/en
Publication of WO2003049278A3 publication Critical patent/WO2003049278A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

A signal processing element for a high frequency application for minimising distortion introduced to an input signal by a main amplifier. The distortion generated in the main amplifier is present in a return signal originating from the main amplifier input and also in a main signal originating from the main amplifier output. The return signal is isolated from the input signal to form an error signal and then magnitude-phase conditioned. A comparison of the main signal and the error signal at a coupler results in a linearised output signal with any intermodulation products suppressed. Alternatively, the amplifier can be replaced by other non-linear radio frequency devices, for example, a mixer or a gain/phase controller.
PCT/GB2002/005509 2001-12-06 2002-12-05 Signal processing element WO2003049278A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02804314A EP1508197A2 (en) 2001-12-06 2002-12-05 Signal processing element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0129309A GB2382936A (en) 2001-12-06 2001-12-06 Amplifier linearisation utilising amplifier return signal
GB0129309.1 2001-12-06

Publications (2)

Publication Number Publication Date
WO2003049278A2 WO2003049278A2 (en) 2003-06-12
WO2003049278A3 true WO2003049278A3 (en) 2004-12-16

Family

ID=9927191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/005509 WO2003049278A2 (en) 2001-12-06 2002-12-05 Signal processing element

Country Status (3)

Country Link
EP (1) EP1508197A2 (en)
GB (1) GB2382936A (en)
WO (1) WO2003049278A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11502650B2 (en) 2020-06-29 2022-11-15 Kabushiki Kaisha Toshiba Power amplifier and method of linearizing a power amplifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638134A (en) * 1969-11-26 1972-01-25 Bell Telephone Labor Inc Reflectionless amplifier
US4056785A (en) * 1976-12-06 1977-11-01 Bell Telephone Laboratories, Incorporated Low-noise microwave amplifier
US5736898A (en) * 1995-08-04 1998-04-07 Daimler-Benz Aerospace Ag Process and device for linearizing the gain charactristics and phase-frequency characteristics of traveling-wave tubes and transistor amplifiers at different power levels
US5869993A (en) * 1996-02-01 1999-02-09 U.S. Philips Corporation Distortion compensation for a capacitively loaded follower

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638134A (en) * 1969-11-26 1972-01-25 Bell Telephone Labor Inc Reflectionless amplifier
US4056785A (en) * 1976-12-06 1977-11-01 Bell Telephone Laboratories, Incorporated Low-noise microwave amplifier
US5736898A (en) * 1995-08-04 1998-04-07 Daimler-Benz Aerospace Ag Process and device for linearizing the gain charactristics and phase-frequency characteristics of traveling-wave tubes and transistor amplifiers at different power levels
US5869993A (en) * 1996-02-01 1999-02-09 U.S. Philips Corporation Distortion compensation for a capacitively loaded follower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MCNEILAGE C ET AL: "Review Of Feedback And Feedforward Noise Reduction Techniques", FREQUENCY CONTROL SYMPOSIUM, 1998. PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL PASADENA, CA, USA 27-29 MAY 1998, NEW YORK, NY, USA,IEEE, US, 27 May 1998 (1998-05-27), pages 146 - 155, XP010305536, ISBN: 0-7803-4373-5 *

Also Published As

Publication number Publication date
GB0129309D0 (en) 2002-01-23
GB2382936A (en) 2003-06-11
WO2003049278A2 (en) 2003-06-12
EP1508197A2 (en) 2005-02-23

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